Gen Medvedkin in lab.jpg (65272 bytes)
In the office, laboratory building "A"

 Let us introduce !

MEDVEDKIN Gennadiy Aleksandrovich,

I am a Doctor of Sciences in Physics and Mathematics working as a Senior Scientist at the Ioffe Physico-Technical Institute.

As a leader of a research group I am conducting studies in Semiconductor Materials, Physics, Optoelectronics, Optics, Thin Films and Single Crystals.        List of publications and patents.

The main subject of my investigations are Compound Semiconducting Materials such as Ternary Diamond-Like Materials. The most bright representatives of the material group include CuInSe2, CuInGaSe2, and ZnGeP2, CdGeAs2 that have already found their application in thin-film solar cells and single crystal non-linear optical converters.

New chalcopyrite semiconductors with transition metal Mn have been created in 2000. (Cd,Mn)GeP2, (Zn,Mn)GeP2 single crystal and polycrystalline materials reveal Ferromagnetism at Room Temperature. We have a priority of invention in preparation of these new materials and hold Japanese and World patent.

There is as well a series of strongly anisotropic crystals (like CdSnP2, CdGeP2, CdSiAs2) that show their future prospects as materials for Polarization Sensors and Photoanalyzers. This new class of optoelectronic devices has been worked out and patented at the Ioffe Institute.

Another ternary materials as a vacancy ordered semimagnetic compounds (like MnIn2Te4 and MnGa2Te4) represent a very interesting subject for fundamental investigations, e.g. in magneto-optics, polarization optoelectronics.

The quaternary materials (like Cu2CdSnSe4 and Cu2CdGeSe4) could find their application as optoelectronic materials, e.g. as a cheaper alternative for thin film solar cells instead of CuInSe2 compound.

bulletA special method has been worked out to supply any kind optical sensors with a new feature - polarization sensitivity (independently on type of semiconductor material, i.e. isotropic/anisotropic; on spectral range, i.e. from infrared to X-ray wavelengths; with no additional polarizing elements). The method was tested using optical sensors on Si, Ge, CdTe, GaAs crystals, thin polycrystalline/amorphous films within spectral ranges of their individual sensitivity.
bulletAt present we are collaborating in room-temperature FM chalcopyrites with a research team of Professor Sato Laboratory in Japan at the Tokyo University of A & T.
bulletWe do some joint measurements in the Laboratory of Professor L. Molenkamp at the Würzburg University in Germany. Recently the 2nd International Conference on Physics and Applications of Spin Related Phenomena in Semiconductors - PASPS-2002 was held in Würzburg. Papers will be published in JOURNAL OF SUPERCONDUCTIVITY: Incorporating Novel Magnetism. Photo
bulletWe continue to keep in touch in thin-film solar cell investigation with a Group of Professor L. Stolt at the Uppsala University, Angstrom Solar Center in Sweden. See also the Photovoltaic Science and Engineering Conference (PVSEC-12), Cheju (Korea).

 

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